[Amps] shorted filter cap

[Danny Pease]

Shorted is relative. If you can measure low enough, there is no such thing
as a short. A piece of wire is usually considered a short, but we all know
it has some values of resistance. A few ohms compared to a several hundred
thousand or even millions, is a short.

An open filter cap seldom goes bang.

NG9R




Date: Thu, 11 Feb 2010 20:45:37 -0800
From: "Bill, W6WRT" <dezrat1242 at yahoo.com>
Subject: Re: [Amps] Results from new PSUD... resistor b4 the B+ filter
	caps !
To: amps at contesting.com
Message-ID: <l4n9n5ppc3k2couoct2huod59258u2u0kj at 4ax.com>
Content-Type: text/plain; charset=us-ascii

ORIGINAL MESSAGE:

On Thu, 11 Feb 2010 18:29:58 -0500, Roger <sub1 at rogerhalstead.com>
wrote:

>>   
>Ohhh...Yahhhh! They are loud too<:-))
>The first one was in a fairly new Dentron DTR-2000. Actually it was in a 
>lower voltage circuit. It blew the can right off the cap. The *empty* 
>can hit the top of the amp so hard it squashed down. It looked a lot 
>like a 38 wadcutter that had hit something really solid. <:-)) The can 
>started life at roughly 5/8" to 3/4" in diameter and about 1" tall.

REPLY:

I doubt if it was shorted. Most likely it was leaky and that caused it
to overheat. One that is dead shorted is not likely to overheat at
all. Ohm's law, ya know.  :-)

73, Bill W6WRT


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